enter image description hereI was wondering how you would find the stiffness matrix of a triangular frame with unknown angles.

A little context The pumpjack model involves a triangular frame on which the rocking beam is supported. How would you find an expression for the displacement of the pivot point as a function of the force and the properties of the frame I and J. [A visual of what I mean]

  • $\begingroup$ If the angles are really unknown, I don't think you can. But is it really so? What do you know about the frame? $\endgroup$ Commented Aug 22, 2023 at 16:44


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